Automatic sampling device



J. E. BORETZ ET AL AUTOMATIC sAMPLNG DEVICE March 11, 195sr 6 Sheets-Sheet 1 Filed Aug. 17, 1954 OLTON BORETZ WILLIAMS INVEgITOR .JAMES A. JONATHAN e. BYJoHN a,

March 11, 1958 J. E. BoRE-rz ET A1. 2,826,076

AUTOMATIC SAMPLING DEVICE Filed Aug. 17, 1954 6 .Sheets-Sheet 2 FIG.2

lNvl-:NT R JAMES A. am. on .lomfn'HANl E. aoRErz BYJol-m a. wlLLmMs March 11,A 1958 J. E. BQRETZ ET AL AUTOMATIC SAMPLING DEVICE Filed Aug. 17, 1954 6 Sheets-Sheet 3 F l G f//nf FIC-3.4

, INVENTOR JAMES A. BoLToN JONATHAN E. BoRErz BY JOHN a. wlLuAMs March 11, 1958 J. E. Bom-:TZ ET AL l 2,826,076

AUTOMATIC SAMPLING DEVICE Filed Aug. 17, 1954 6 Sheets-Sheet 4 FlGQa' h DETEoToR EvAPoRAToR 173 DISPENSER VH /M 68 Ff'm 65 a) y I. ill] 64 42 10/ wAsHER FIG. 2 A

l I lNvx-:N'roR H l.JAMES A. BoL'roN T l f JONATHAN E. BoRETz hl v BYJOHN B. WILLIAMS E I' M March 11, 1958 E. BoRE-rz Erm. 2,826,076

AUTOMATIC SAMPLING DEVICE Filed Aug. 17,1954 e sheets-sheet 5 lFlcs INVENTQOR .maas A. aol. n JONATHAN E. aonsrz BYooHN s. wLuAus March 11', 1958 .1. E. BoRETz ET A1. 2,826,076

AUTOMATIC SAMPLING DEVICE Filed Aug. 17, 1954 s sheets-sheet e POWER SUPPLY INVEN'I.'r R

JAMES A. BOL N JONATHAN E. BORETZ BYJOHN B. WILLIAMS United AStates Patent MO 2,826,07 6 AUTOMATIC SAMPLING DEVICE Jonathan E. Boretz, Glen Rock, N. J., and James A. Bolton, Darien, and .lohn B. Williams, Greenwich, Conn., assignors, by mesne assignments, to the United States of America as represented by the United States Atomic Energy Commission Application August 17, 1954, Serial No. 450,416 11 Claims. (Cl. 73-422) materials. Industrial applications frequently require that material being manufactured be constantly monitored at predetermined intervals by selecting samples thereof, to ascertain whether any change has occurred during the processing of the product being manufactured. For example, certain chemical processes wherein a compound is being manufactured require that an analysis of the constituents comprising the compound be made at designated intervals to provide a quality control of the process. Accordingly, such analysis may consist of conventional colorimetric measurements of the product wherein a measured amount of product is placed in a chemically clean receptacle, conventional colorirnetric testing substances are added thereto in measured amounts, and the resultant analytical colors obtained are detected by photocells or other light measuring means whereby various percentages of substance present in a composition of matter may be ascertained from the hue or strength of the detected colors.

In addition to control of processing, it is often expedient to sample the radioactivity of a material at designated intervals in order that any increase of the radioactivity therein may be quickly detected. For example, the water ted to boilers in atomic energy installations must be analyzed for dangerous increases in radioactivity, or the cooling water in a reactor must be sampled to determine when it has become excessively radioactive. Furthermore, analysis of the sewage from hospitals should be made at intervals to prevent eventual contamination of the public water supply system by addition of radioactive waste products in the hospital sewage.

Previously, in both such processing and radioactivity control functions, the various steps of sampling have been performed by hand, requiring constant attendance of an operator or at least that he be present at designated sampling times. Furthermore, such sampling has required that the containers used therefore be chemically clean and, in the case of activity sampling, free from radioactive material. Such requirement necessitates scrupulous and troublesome cleansing of the receptacle if yit is to be used repeatedly, or the disposal of a relatively expensive laboratory receptacle after a single use.

The present invention contemplates a novel apparatus for automatic sampling and analysis of a material whose selected physical or chemical properties are to be monitored. Accordingly, a continuous length of reeled, metallic tape is provided which is advanced in step-wise, intermittent fashion past a series of stations, wherein the tape is successively indented t-o form receptacles therein. The receptacles are then filled by a dispenser with material to be analyzed, heated if necessary, to drive out moisture Patented 'Mar'. 1 1, 1958 ICC from the material being sampled, surveyed by analyzing devices, and then reeled up on a disposable reel.

Accordingly, it is an object of the invention to provide an apparatus for both automatically sampling discrete increments of material and automatically analyzing the chemical or physical characteristics of each sample.

It is another object of the present invention to provide a plurality of disposable receptacles integrally attached to each other in a belt-like configuration so as to facilitate the handling and disposition of incremental samples of material having characteristics t-o be analyzed.

A further object of the invention is to provide a material sampling mechanism for continuously determining the presence of selected characteristics or properties of such samples which allows intermittent unattended sampling.

Another object of the invention is to provide material sampling apparatus for analyzing chemical or physical properties, and in particular the radioactivity, of selected samples in which the elapsed time interval between the withdrawal and the analysis of a sample is minimized and maintained at a constant difference between successive sample selections.

For a better understanding of the invention, together with other and further `objects thereof, reference is made to the following detailed description taken in connection with the accompanying drawings, in which:

' Fig. 1 is a side elevation of the automatic continuous sampling machine.

Fig. 2 is a sectional end elevation taken on line 2-2 'of Fig. 1 illustrating the automatic cup forming or indentation mechanism. Fig. 2A is a plan view of a portion of a tape illustrating these indentations made in the tape. Fig. 3 is also a sectional end elevation taken on line 3 3 of Fig. 1 illustrating the automatic uid depositing device.

1 Fig. 4 is a detailed side elevation of the indentation or embossing mechanism and the uid depositing device.

Fig. 5 is another sectional end elevation taken on line 5-5 of Fig. 1 illustrating the heating and evaporating device.

Fig. 6 is a sectional end elevation of the intermittently actuated tape pulling and attening mechanism.

' Fig. 7 is a sectional side elevation of the tape pulling actuating arrn, taken on line 7-7 of Fig. 6.

Fig. 8 illustrates diagrammatically a modtication of the invention.

Fig. 9 is a block schematic diagram of an alarm system suitable for use with the monitoring device of Fig. l.

Referring now to the drawings, the preferred embodiment of the automatic continuous sampling machine comprises a suitable frame or housing K, shown in Fig. 1, provided with a vertical supporting plate 10 to which is secured a suitable bearing bracket 12 (Figs. l, 2 and 4), rotatably supporting a shaft 14 which has a sprocket 16 mounted thereon. The sprocket 16 is driven by means of a chain 18 from a sprocket 20 mounted on a shaft 22 protruding from a suitable variable gear reduction motor 244, secured to an upright member 26 of frame K (Fig. 1), A crank stud 28, secured to sprocket 16, has a connecting rod 30 pivotally fastened to one end thereof. The other end of connecting rod 30 is pivotally attached to stud 32. which is held by the free end of an arm 34 (Figs. l, 6 and 7). Arm 34 is clamped by means of a bolt 36 to an outer member 38 of a conventional, one direction roller clutch 39, such as a Hilliard clutch. The outer member 38 engages with an inner member 40, which escasas figuration to,lclu tch, 39. to shaft 42 to provide an adjustable, stabilizingwdrag,

Attached to shaft 42 is a sprocket 46 which is connected to a sprocket 50 by means of a chain 4S. Sprocket 50 is loosely mounted on ashaftSZ and 'isrotatably sup; ported by a.suitablebearingbracket (not shown) fastened toithefvertical supporting ,plate-,19. Sprocket 0. has. its hubcoupled. to a conventionalslip, clutch 54-whieh;may be,V of ,the- RLH, type, manufactured by the.- Buffalo, Machine` Company. Shaft. 52 has .mounted thereon.r both slip clutch 54 andalso a ytwo-flanged, adjustablegtapeyreceivingwheel 56 (Fig.i l) which is employedforthepurposexof'receiving and winding; upnthe usedendzof-Iaztape T, which is :pulledfrom another tworflanged, adjustable tape wheel't58... Compensation for;,the constantly increasing.- lineal gspeedk of the-.tape-passing through. the machine, duetothenincreasingradiusof thewinding zdrum, is. providedl by.VV driving tape,y receiving wheel 56; at ,aispeed in excess f, of; that. required. yand then.; .slipping the.: wheelI by means of slip clutch 54.

Tapefdrum 58- is :mounted -ona horizontaLshaft .60,and also coupled Vto .aislip clutch .162 which is in Contact with a stationaryybearing ,hubl (not shown)v projecting. from plate-.llainiorder to createsufcient drager tensionto prevent .the ,etape-from .unwindingitsel The slip. clutch 62.may be; of thesame `RLH .type as the;clutch;.54-men tioned above, if desired.

The tape.T-.is .preferably` metallic .in composition and fabricatedfrom agm-etal whichis substantially.non-reacting with.the .sampled.material. For most applications,.an aluminum tapemay be employed, Vbut in instanceswhere the. physical orchemical properties ofa reacting substance is to be detected, a stainless steel or coated. heavy, paper tapemaybe utilized if desiredl The wound,: freshtape is. led.from a-.reel .R on tape wheel t58.0verfan idler roller 64 and through a cup-form.- ing or.- indentation .device C,.and guided :beneath an automatic fluid depositing device F. The tape is further led over a yguide wheel; arrangement G beneath a radiant heatingand-:evaporatingevice H and also beneath a-num. ber of 'suitable radiation monitoring units M to engage withra pair of feed-rollers 66 and.68v (Fig. 6). These rollersiareutilizedto pull the threaded tape intermittently from the reel R overthe idler roller 64.

Rollers 66 .and/68 also.y serveras flattening vmeansfor. the indentations or depressions made in tape T by the cupfforming deviceCin; order that the tapegcan ,be reeled smoothly ontothe, tape.receivingwheel 56. A.smaller volume of used tape. is thus provided for, future handling and disposition.` Roller: 66 x fastened. to Avertical shaft `42.is intermittentlyl rotatedy througlii.;armA 3.4, lconnectingfrod 30 and crank stud 28. Fastened to one side -of roller 66 isa gear.A 70 which meshes with agear. 72 secured .to the side-of roller 68-.for'imp,arting,intermittent driving motionl thereto. Roller 68;is@rotatablyf-mountedon; a shaft 74.which issupportedby a.,pair ofbearing blocks, 76, each of which. isryieldingly mounted on a. vertical guiderod .78.which also .slidingly ,protrudes fromthe end of shaft 74..

The lower end of, each.rodE 78 l is provided witha threaded portion 80 whichis securely held in a=hole .of the bearing ,bracket 44. Acompression block 82 having a suitably shaped releasel fork .84 vpivoted thereto, slid ably engages the .upper portion, of each ofthe vertical rods 78.' Rods 78 each havea tension springaxially mounted thereon and disposedbetween the head of each. rod'and top surface assert `a downward pressure on each' bearingublock .76 when`release forks 84 arein a lateral' position.` The necessary pressure is thus-transmitted vto roller 68 toeffect a flattening-of the indentations I on the tapeTas it' passes through'rollers'66 and68ipiior to being rolled upon'the receiving wheell '56:'

Iiidentations are pressed into vtheftape-T v'by the cup forming 1 or indentation device C' as the e tape :intermit-fand.` adjoining thereto is keyedv of each compression block 82 so as to` r end 'thereof aisuitablerstudlfil mounted 4'. tently'comes to rest'beneath'it. Due tothe intermittent motion of the tape, the indentations I are pressed evenly spaced and appear on the tape as indicated in Fig. 2A. A sufficient indentation depth for sampling purposes is approximately one-sixteenth inch. However, any suitable depth may be achieved by selection of die members.

The indentation and cup=forming device C shown in Fig. 2 has a vertical plunger 901'slidably supported in a vertical clamp and guide sleeve 92, which in turn is slidablyf'supported by aguide bracket 94lsecuredl to the ver' ticalsnpportplate 10. The guide sleeve'92 is held in its normal upward position withintheguide bracket 94 by a spring 96 rsurrounding the. upper. portion of the sleeve, which is confined to the top surface of the guide bracket 94 by awasher98--andretaining'ring l100. Theplunger is held in its normal upward position within the sleeve 92 by means of asuitable spring 102 axially positioned between the upper end of sleeve 92 and the washer 104 secured toplunger 9.4:,bya,retainingming-.106.Y The top end..fof,` plunger 941 isprovidedA withan adjustable. stud 107.

Beneath the plunger 90 and: clampingsleeve 941is1loe cated ay suitable die i 108which Lis seated in Aa idie Lsupport- Ingmember.110-andiiheldfinplacenby snap ring 11210 permitlready; removal or replacement ofthe die. Die supporting memberlli) isasuitably secured tothelower face.` of-.guidenbracket 94:.

The plunger;-90-.and Vthe-guide;clarnpsleevexZ are intermittently,v actuated byfmeansgof-a disc 114 pivotally attached to -afcrankpin.1161projecting-fronrthe end of the shaft'14f` As .the cranktpin. 116 approaches its lower position-v during ,a :portion .of .each revolution of .the shaft 14, ythedisc 114 -contactsthe stud 107 projected. from the topend of plunger. 99.and presseslthelatter downward onto andinto tape:l T, Awhich1at .thatV moment is.at rest between. the,- plungerrf. 90p and the die 108.v The downward movement of? thevplunger in conjunction. with the female stationary diegeffects .-a cupfshaped indentationin the tapeT. Thedepth-of the Vindentation may be varied byy adjusting the stud 107 Von theupper end. ofplunger 90. As spiingltiZy isgheavier. andstro-nger .than .spring 96, downward movement i of plunger-l 90 causes sleeve 92 .to also move downward and contact the top edges of the tapeT, thus preventingshifting. of the tape during indentation action ofthe plunger.

As .soon 'as theedisc 114 disengages fronrthe plunger studltlif, thefsprings. and 4106 lift 4the clampingsleeve as Iwell.as..the.plunge r .-out` :of .contact with. the :tape and upLA :to theinormal. uprnost position, .as .illustrated in Fig. .2,

Rearwardlydisposedy to. .indentation device .C.. is. fluid depositing-device-F, so -spacedwith.respectto the indentationdevice C thataediscreteindented ,portionof .the tape..will.lie..beneathf the. fluid depositing device when forwardmotionof the .tape .hasbeen halted .momentarily to allow indentation :thereof bygindenting device C. The fluiddepositingdeviceF-isactuated by a suitablecam fmountedonthe` shaft l14,.' Cam 121B -is in continuous contactwithe .cam roller 122, which is loosely pivoted tothe freeendofan arm 124 and pivotally supported byasuitablestud 12`6I-held.v by'a vertical plate 10. The hubof the arm.124 is. provided with a tension spring 128 (Fig, 2) for keeping, theccarn follower 1221 in continuous contact wit-h".cai1i.12t).7

Allug lifadjustably atta-chedtoarin124, has on the above and lying in register. With..thc.upp er.endof-sayertical plunger 134. Asshown 1`n.l*`i"g.,.3r `one .end of .plunger 134 has a piston 136"extending,intoY avertical .cylindrical bore 138 of a. valve housing 140.ofthe fluid'dispensingdevice F. The bottom end of v.cylindrical bore 13S is connected to a fluid dispensingwduct 144 'and a fluid receiving duct 146 `by` meanscfja duct'142l. Duct 146 'is connected :to a fluid receiving' chamber 148" which is. connected to a suitablesupplypipe 152 by'a tube 150.V Fluid dispensing -duct'i144 isalso connected to a -dispensing'head '154; se

asesora cured to the underside of housing 140 and provided with suitable nozzle 156, located above and within the area of indentations I when the latter is resting momentarily therebelow. The uid receiving chamber 148 and the duct 142 are separated by a conventional check valve 158, 'and the fluid dispensing duct 144 and duct 142 are separated by another check valve 160. Both valves 158 and 160 are normally held in closed position by tension springs 162 and 164, respectively.

The upper portion of the vertical plunger 134 and piston 136 is also surrounded by a tension spring 166 employed for the purpose of keeping the piston normally in its uppermost position within the cylindrical bore 138. When, during the continuous rotation of shaft 14, the roller 122 `of -arm 124 rides onto the high portion of cam 120, the arm pivoted on stud 126 causes lug 130 to swing downward so that the stud 132 contacts the upper end of plunger 134 forcing it downward. Downward movement of plunger 134 and attached piston 132 creates a pressure which causes check valve 160 to open and force fluid resting in bore 138 and duct 142 into dispensing chamber 144 and dispensing head 154, from where it is sprayed into the indentations I of tape T through nozzles 156. Further rotation of cam 120 allows roller 122 to ride onto the low portion thereof causing arm 124 to raise lug 130 upwardly. Plunger 134 and attached piston 132 also move upwardly due to the reaction of sp-ring 166. When the pressure of the piston upon the uid and duct 142 ceases, valve 160 closes and the upward movement of the piston in bore 138 creates a vacuum therein as well as in duct 142.

This vacuum causes valve 158 to open and permit uid from the receiving chamber 148 to enter into duct 142 and also into bore 138. As soon as the vacuum is replaced by liquid, valve 158 closes again and upon the next downstroke of the piston, fluid again is sprayed into the next indentation in the manner described above.

By utilizing a small volume pump of the type described, in which there is no large reservoir for holding fluid awaiting test, the time differential between the instant of sampling and the instant of detection is held to a minimum. Thus almost instantaneous testing of 'a chosen material is effected.

. After the uid is deposited in the successively passing `indentations I, the tape T in intermittent 1or stepwise movements, then passes beneath the radiant heating and evaporating device H (Figs. 1 and 5), where the water or lany other uid acting as a carrier for substances to be examined is evaporated. Evaporation of the water is desirable as it otherwise acts as a shield for the radiati-on yand hinders efficient detection of radioactivity by monitoring device M. Evaporating device H may comprise ya plurality of heating elements 168, such as Chromolux heaters which are arranged and mounted in -a suitable cover or hood 170. Brackets 176 secured -to the vertical frame plate provide supports about which cover or hood 170 may be pivoted by means of studs 174 vand lugs 172. Hood 170 is also provided with a pair of knobs` 178 to facilitate the lifting thereof if desired. To increase vheating eiciency, the hood also may be lined with.. a suitable deector plate 180 as illustrated in Fig. 5.

, Hood 170 is furthermore provided with a `slot-like opening 182 which forms a connection to ya suction chamber 184 secured to the vertical 'plate 10. Fan 188 secured -to the rear side of vertical plate 10 creates a suction through opening 186 to facilitate removal of moisture-laden air beneath the hood 170 during the evaporation process. In general, the density of the sample( 'material is thereby increased by removing all volatile products therefrom.

` When passing beneath the radiant heating and evaporlating ydevice H, the tape T -is supported by a suitable bracket plate 190, and guided by laterally adjustable side rails 192 `and 194. It is understood that ytape of any suitable wid-th may be utilized by merely employing reelsV having hubs of diierent widths and adjusting the spacing of side rails 192, 194 to accommodate the different widths. To facilitate threading and alignment of the tape T, side rai-l 194 is pivotally secured to the front edge of the bracket plate 190. Guide rail 194 also carries a suitably shaped deector plate 196 designed to concentrate the heat beneath the hood to aid in the radiant heating process. To prevent the loss of suction, the lower edges of suction chamber 184 which contact the hood 170 are provided with suitable shields 198.

Moni-tering device M, beneath which the tape passes after leaving the evaporating and heating apparatus H, comprises a plurality of radiation measuring tubes, which are designed to provide means for detecting the amount of radiation in the samples passing therebeneath. The measuring tubes may comprise a lplurality of scintillati-on type counters; for example, one or more of the tubes may be alpha counters, while another may be a beta or gamma counter of the type manufactured by Nuclear Instrument Co.` Of course, ionization chambers or a Geiger counter may be provided if desired. Adequate cooling for the counters is provided by means of an air intake and conducting duct 202 which is connected (not shown) to the intake of suction blower 188. The counters, when connected by means of cables 200 to suitable measuring devices will provide quantitative and qualitative measurements of the amount of radioactivity in each sample. They may also be used to operate alarms or any suitable control system which may be of the type which provides an alarm when the radioactivity of the material being tested has gone beyond a predetermined limit.

A suitable alarm system is shown in Fig. 9. Cables 200 are each connected to a conventional counting rate meter 300 which, in turn, are connected to associated indicating meter-type relays 302. The normally open contacts 304 of relays 302 are connected in parallel with each other, and in series with a suitable power supply 306 and a parallel connected lamp and buzzer 308, 310. Thus, when any one of the counters of monitoring device M detects an increase in radioactivity, the resulting rate of increase in counts causes its associated counting rate meter 300 to energize the indicating meter relay 302 to which it is connected, thereby closing contacts 304. Closure of any of the parallel contacts 304 completes the alarm circuit and allows lamp 308 to light and buzzer 310 to sound, thus indicating that the radioactivity of the material being tested has exceeded a predetermined limit.

The activation and operation of the entire unit is controlled by control box 204 which has suitable start, stop and jogging controls 206 and a speed control 208 therein which may be a variable or auto-transformer for varying the line voltage of motor 24. Also, if desired, suitable timing circuits may be contained in control box 204 for causing the mechanism to be energized only at preselected intervals. For example, it may be desirable to sample certain waters only once per hour, rather than having continuous sampling.

The automatic sampling machine is set into operation by pressing the start button from the group of push buttons 206 in order to connect a source of electrical energy thereto, and then adjusting auto-transformer 208 to set motor 24 at a speed sufiicient to advance tape T at a desired rate. Motor 24 through suitable reduction gearing then actuates sprocket 20 which in turn drives sprocket 16, the main driving sprocket. Rotation of" sprocket 16 actuates reciprocating shaft or rod 30 which in turn drives the one-direction roller clutch 39. Engagement of the clutch 39 for each forward stroke of reciprocating rod 30 advances tape T, in step-wise, intermittent fashion, an incremental length during the period of clutch engagement, causes one indentation I in tape T to be crushed between rollers 66 and 68, and also rotates reel 56 an incremental amount by means of driving chain '48. Rotation of sprocket 16 alsocauses tape T to be indentedonce eachrevolution thereor'y, actuatingdiemerljer 90"by, means ofrrotatingvcamsl'ili.' Similrleach indentation is'V lled with 'sampledfliquidatthe.'proper instanvfrom the dispensingpump E by-` rotatingcamrIltl" and plunger arm 124.` Of course. the respective positions ofcam lltfand 120. are adjustedlprevi'ous-to operation offth'e apparatus so as ltolprovide proper-sequential operationY of yindentation devicehCanddispensingpumrFfA Actuation of: .the startingQ push'` button also .connects an electricalM energy sourcestoeradiant energy lieatersc'i, blowers ltsand. pl-aeessthendetecting, andrmeasuring-r apparatus connectedfftor rad-iat.-io1rdetectorsvM.y in. operating.

conditions Ttius,as :motor 24rotates,-1tape T isconsta-ntly unreeled :from :reel t58 and. indented-.byf-indentation! :device C. The.v indentation is illedbyf dispensing; pump'fF, the moisture-from the filled indentation 'is evaporatedbyrheater H', andathefaradioactive material inthe-residue thereof isv constantly; detected :by .fradi'ati-on detectors. The indentation Vis :thenapressed'out of the, tapefT,y .and the attened andexpendable used taperis :wound onreel 5610r kbe discardedwhen.convenient.

ln sampling applications `Where-fthe 'normal levellof radio-activity :of .al sampleis relatively high :andit iis only desired tod'etect'V sudden increases: of radioactivity l into highfactivity levels; the'tape'needl notlv bediscardedafter use; butl'may'belprepared forreiuseibywashing. As-.a large-perce`ntage-fof' the f contaminantfisl thereby washed ori,A any`radioactive residue remainingaccounts'fr only a low percentage of thenormaliactivityfleveli of 'the sainple being *tested In such applications; the reeled, but may be in the form of an-endl'essbel'toniwhich small amounts of Vfsar'n'pledf m'aterialzmaybeI placed', or, if desired, the'belt may havev permanentpre-indented depressions formed therein.' Assh'ownin Fig. 8`, the endless belt in such instances may be'mounted onsuitable pulleys and advanced by means of`roll'ers' 67, 68,' and idler roller 64. A* wash bath W issuitably positioned so that the tape passes therethrough on its 'return-'trip afterpassing beneath the radiation'detectors* O'fcourse; indentation device C is rendered inoperative `When`apre`indented 'tape iis utili'zed.'

If desired, Ythe `activity.ofsoli'd' material may berneasured automatically by the apparatus. It 'is preferable, in such uses, to firstcomminu'te the 'material to'be sampled, and then deposit'the material-by means of a suitable dispenser into the indentationsof 'the tape Tl- Thedisp'enser may be similar to dispenser device F, but'modi'edfor handlingsolidmaterial.V When solid material is sampled, the `dryingvstep .may be eliminated,l if desired.

Although an4 automatic sampling-device for detectingv the radioactivity ofmaterial is showmyet it is understood that selected properties Vof a chosenimaterial 'sample other thanthe physical-property of radioactivity may be detected, and quantitatively and qualitatively measured by the invention. For example, the samplermay'be adapted to analyze by colorimetric' measurements `the chemical constituents of a material by substituting Aphotoelectric or other suitable detectors in placeoffthe radiation detector M. The material tofbe analyzedwith' suitable colorimetric testing-,substance previously added-thereto-isplaced in the tape indentationsbyvuid dispenserF and conveyed to the detectors Wherethel substance is.' analyzed without the application of heat from drier While the present` invention has been disclosed by means of speciiicillustrative-embodimentsthereofQit would be obvious.V to vthose skilled .in the-fart that various changes and modifications. in the kapparatusmmay bemade. without departing from .therspirit ofthe inventiontas detinedinthe appendedL claims..

We claim:` f

1.- Apparatus for continual. sampling Lof Amaterial and. detecting selected properties thereof comprising means forA selectively samplingdiscreteportions -of material-.from aA tapelnee'd not i'be'- supply of-said material, a detector for-detecting fa selected propetyf'o said"saittip1ed` m`atrial,.aplurality cf receptaclsarraig'edfii belt-like fashion, each of saidrecept'acl'es being-,adapted Ito receive one of said samples, means for continuously. conveying said lled receptacles past said detectors so that lthe selected property: of :said samples may beA detected,v.and rotatable `stc" rage-Ineans for storing said receptacle nbelt-.after saidsamplesliave been subjected to said detector, said conveying means having indexinc means operatively, connectedto said @mutable-storage means for advancing. said-receptacle belt instep-Wise fashion at predetermined-interval Y 2lV Apparatus` forhcontinualfA sampling? of material y and detecting selected properties thereof,comprisingmeans for selectivelysamplingfdiscrete-portions ofl material from a supply or said material, a detector for' detecting .a selected property of saidsampledfm-aterial','means forvcontinuously con-veyingsaid-vsarriples'-lpastisaidfdctectorA so? that the selected. property `of saidisam-pl'es may be detected,said conveying'means in'cludingsa vcontinuous strip ofv receptacleformin'g material', and` means' for.` indenting said strip at spaced intervals toformreceptacles therein, said sam-` pling-:means'including means for filling said indentationsf Wit-l `saiddiscrete portionso sampledinaterial.

3.' Apparatus kfor continual-sampling or' material and detecting selected properties thereot` comprising means for selectively* sampling.A discrete portions of material trompa-'supply'. of said-materialsa detector for detectingv a selected propcrty'fof said sampled material, a continuous strips-of.receptacle=forminglmaterial, means for indenting said strip to form receptacles'thercin;said sampling means' including meansfor-tilling'saidindentations with said samples ofdiscrete portions of material andconveying means having /indexing'lmeans' for advancing said continuousstrip inflst'ep-v/isefashion at predetermined intervals, said indexing.v means including means `forsequentially actuating saidlsamplinghmeans'an'd'saidindentingmeans insynchronisnr' With the 'moi/enten@ of" said'continuous" strip of taterial softhatsai'dreceptaclesare form'edin 'said stripofi materialI "and -iii-led ib'y said- 'samplin means Sini-'proper' timed lrel'atonshi 4: Apparatusfoif continual sampling of material-v and detecting selected properties thereocomprisingl means for selectivelysampling discrete-portions of said material, at least on'ehdetector forfde'tectingat least one selected property" of; said sampled rn'ater'iaLl means for continuously conveying; said :samples past said detectors to detect selected propertiesof said samples, saidconveying means including a continuous strip of receptacle-forming materialymeanslfor' indenting saidstrip at spaced intervals to' form receptacles therein, said sampling means including'means'ior filling salidindent-ations with said discrete portionsL of` sampledniateriV and adjustable guiding means*for*guiding"said'fcontinuous strip of receptacleforming' material-past said receptacle indenting means," said-sampling means,` an'rl'said detector, in that order.

5. Apparatus'for-continual -sampling of liquid material' and vdetecting selected'l properties thereof comprising a continuous tape adapted-'.1 to' have depressions impressed therein; inrichting-means for' impressing depressions in said tape'at spaced intervals; means-forsampling selected volumes of said liquid materialfrom a continuously flowing lsnpplythere'of; said Vsampling means including a disp'ens'ing'pumplfor filling each depression with said selected; volume'of liquidtsample, atleast one detector for `detect'V ing 'at least'oneselectedproperty of 'each of said sam# ples and meansvr fori advancing said" tape past said indent-l ingmeans, saidsampling ,nieans`,' and'said 'detector' in'that order.

6. Apparatusfor continual' sampling; of'materialv and' detect'ing.,selected properties thereof comprising means for I'selectively sampling..discrete portions? of said materialgadetector forldetecting a selected property'of 2saidi sampled materiaLmeans for continuously conveyingsaid',

.samplespast said detector sothat a property of said material may be detected, said conveying means including a continuous strip of receptacle-forming material, means including a spring actuated die for indenting said strip at spaced intervals to form receptacles therein, said sampling means including means for illing said indentations with discrete portions of sampled material, and adjustable guiding means for guiding said continuous strip of receptacle-forming material past said die so that receptacles are indented in said strip by said die at predetermined spaced intervals.

7. Apparatus for continual sampling of material and detecting selected properties thereof comprising cam-operated means for selectively sampling discrete portions of material from a supply of said material, a detector for detecting a selected property of said sampled material, a continuous strip of receptacle forming material, cam operated means for indenting said strip to form receptacles therein, said sampling means including means for filling said indentations with said samples of discrete portions of material and conveying means having in* dexing means for advancing said continuous strip in stepwise fashion at predetermined intervals, said indexing means including selectively positioned cams for sequentially actuating said cam-operated sampling means and said cam-operated indenting means in synchronism with the movement of the continuous strip of material so that said receptacles Will be formed in said strip of material and filled by said sampling means in proper timed relationship.

8. Apparatus for continual sampling of material and detecting selected properties thereof comprising means for selectively sampling discrete portions of material from a supply of said material, a detector for detecting a selected property of said sampled material, a continuous strip having receptacles indented therein at spaced intervals, each of said receptacles being adapted to receive one of said samples, means for continuously conveying said filled receptacles past said detector so that the selected properties of said samples may be detected by said detectors, rotatable storage means for storing said receptacle strip after said samples have passed said detector, said rotatable storage means being driven by a variable slippage clutch connected by transmission means to said conveying means and adapted to slip in proportion to the amount of tape iilling said rotatable storing means so that the speed of said continuous strip through said apparatus will remain substantially constant.

9. Apparatus for continual sampling of moist material and detecting the radioactivity thereof comprising an endless conveyor belt having indented receptacles arranged in tandem at regularly spaced intervals, means for sampling selected volumes of said moist material from a continuously moving supply thereof, said sampling means including a dispensing pump for lling each receptacle with said selected volume of moist material, a drier for removing the moisture from said material, at least one radiation detector for detecting and measuring radioactivity of said sample after the moisture has been removed, a washing device for cleaning said belt and removing said samples therefrom which have passed through the sensing field of said detector whereby said belt is continuously decontaminated of radioactive material and prepared for receiving fresh samples from said sampling means, and means for sequentially actuating said sampling means in synchronism with the movement of said endless strip so that said receptacles are filled by said sampling means in proper time relationship.

10. Apparatus for continual sampling of material and detecting selected properties thereof, comprising means for selectively sampling discrete portions of material from a supply of said material, a detector for detecting a selected property of said sampled material, means for continuously conveying said samples past said detector so that the selected property of said samples may be detected, said conveying means including a continuous strip of receptacle-forming material, means for indenting said strip at spaced intervals to form receptacles therein, said sampling means including means for iilling said indentations with said discrete portions of sampled material, and means connected to said detector for operating a device for indicating when said detected properties exceed a predetermined magnitude.

11. Apparatus for continual sampling of material and detecting selected properties thereof comprising means for selectively sampling discrete portions of material from a moving supply of said material, a detector for detecting a selected property of said sampled material, a continuous strip of receptacle-forming material, means for indenting said strip to form receptacles therein, said sampling means including means for lling said indentations with said samples of discrete portions of material, and driving means for advancing said continuous strip past said indenting means, said iilling means and said detecting means in that order, and at least one pair of rollers positioned adjacent said detector and having said continuous strip threaded therebetween and adapted to flatten said indentations after said continuous strip is moved past said detector by said driving means.

References Cited in the tile of this patent UNITED STATES PATENTS 1,675,049 Perkins June 26, 1928 2,287,808 Lehde June 30, 1942 2,302,996 Lilligren Nov. 24, 1942 2,530,306 Land Nov. 14, 1950 2,681,571 Becker June 22, 1954 OTHER REFERENCES The Review of Scientiiic Instruments, vol. 17, No. 7 July 1946, pp. Z55-261. 

